Drill and chuck.



U. A. PALMGREN. DRILL AND CHUCK. APPLICATION FILED MAY 23, 1912.

Patented 0ct.15,1912. 2 SHEETS-SHEET l.

G. A. PALMGREN. DRILL AND CHUCK. APPLICATION FILED MAY 23, 1912.

Patented 001. 15,1912.

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CARL A. PALMGBEN, OF CHICAGO, ILLINOIS.

DRILL AND CHUCK.

useful improvements in drill and chuck, and

is fully described and explained in the specification and shown in the accompanying drawings, in which Figure 1 is a longitudinalsection through my improved chuck showing the drill in elevation; Fig. 2 is an elevation of the lower part of the chuck; Fig. 3 is an end view of the part shown in Fig. 2; Fig. 4: is

a top plan of the drill; Fig. 5 is a longitudinal section through the chuck and a sleeve inserted therein to adapt the structure to receive a taper-shank-drill, the drill being shown in elevation; Fig. 6 is a top plan of the sleeve of Fig. 5; Fig. 7 is an' elevation of the sleeve; Fig. 8 is a View similar to Fig. 4 of a modified form of drill; Fig. 9 is a longitudinal section showing the chucks with two separate sleeves,;

' one inside the other, the smaller sleev'e being adapted to take a taper-shank drill of small size which is shown in elevation; Fig. 10 is an elevation of the larger of the two sleeves of Fig. 9; Fig. 11 is a bottom plan of the sleeve of Fig. 10; Fig. 12 is an elevation of the inner-or smaller sleeve of Fig. 9; Fig. 13 is a bottom plan thereof; Fig. 14 is a longitudinal section through -the chuck, a sleeve and; a small-sized drill of my improved type; Fig. 15 is an elevation of the sleeve of Fig. 14; Fig. 16-is an elevation 'f'the drill of Fig. 14; Fig; 17 is a section through a sleeve adapted to receiVe a fiat drill, and Fig. 18 is a top plan of the sleeve of Fig. 17 showing the drill in position. 7

Referring to the drawings, 20 is the chuck proper, the same being in the form of a hollow cylinder, externally threaded at its lower end and provided with one or more teeth 21' extending downwardly from its lower margin. These teeth may be in any number desired, the chuck in all the illustrations thereof being provided with two teeth, and the other parts of the construction being correspondingly shaped. In one figure, Fig. 8, I have shown a cooperating part adapted to enter a chuck having four Specification of Letters Patent.

Patented Uct. 15, 11912..

Application filed May 23, 1912 Serial No. 699,171.

teeth and, of course, it will be understood that the chuck and its cooperating parts may have the number and position of these teeth vary at will.

22 is a ring internally threaded and adapted to be screwed up on the lower end of the chuck proper, the lower end of this ring having an inturned lip 23.

24 is my improved drill, the same having a cylindrical shank 25 adapted to fit within the chuck proper 20, and having a projecting flange 26 having notches 27 to be engaged by the tooth, orteeth 21, of the chuck proper. In the construction shown in Fig. 41, there are two such notches while in that shown in Fig. 8 there are four such notches, it being understood that'in any event the teeth on the chuck and drill flange are adapted to register.

In using my improved drill and chuck the ring is screwed of the chuck, the drill being placed in position with the teeth on the chuck registering with the notches in the flange of the drill and the ring is then screwed up. In this way a perfectly firm support for the drill in the chuck' is secured.

It is impossible for the drill todrop out or to rotate and yet by a very simple manipuwith certainty and case, when desired, and

because there. is no danger of the drill dropping outof the chuck accidentally while in use, these three pomts being evident and great improvements over the taper-shank drill which is the standard and by far the most common drill in use.

While the ultimate object of my invention is to supply my improved. chuck and drills therefor, as shown 1n Fig. 1, the'drills being supplied in suflicient quantity to be the I so e type used with the chuck, I am aware that when thefirst installation of chucks of this character are made in any plant, there will be on hand necessarily a large number of drills of other sorts, more especially the standard taper-shank drills, and in order to make the chuck practical from the beginning, means must be provided for using up these drills. Therefore, I provide a sleeve 28 the outer configuration of which is exactly the same as that of the upper of the drill 24, except that it is made longer, but it is provided .with the same notched flange 26 as the upper part of the drill. The sleeve 28 however has a tapered socket to receive a tapershank drill and the upper end of this sleeve is slotted for the passage therethrough ot' the flat end of the taper-shank drill. This construction not only enables my improved chuck to be used with the taper-shank drills already on hand, but it makes a combination when used with that drill which is more advantageous than said drill is when used in the chuck especially made for it. This is because the standard taper-shank drill has to be driven out of its socket by driving awedge laterally into the chuck so as to engage with its upper end, and the use of this lateral driving pressure is likely to bend or distort the chuck, or even damage the tool by which this chuck is supported, or of which it forms a part. .lVith my construction when used with a taper-shank drill, the sleeve 28 is re.

moved from place with the drill in it and a tap of the hammer directly on the top of the taper-shank drill will drive it out without any diiiiculty.

When it is desired to use my chuck with drills of a smaller size than'that which it is designed to receive directly, a sleeve 29. is inserted. Two forms of this sleeve are shown in Figs. 9 and 14, but there is no substantial difference between their construction except in the matter of shape. Each of these sleeves has its upper part shaped exactly like the upper part of my improved drill or the sleeve 28 on the outside, and it has the notched flange 26 common to the various members so far described which fit directly in the chuck 20. The sleeve 29, however, differs from the sleeve 28 in that it is made cylindrical on its inside and terminates at its lower end exactly as does the chuck, but on a smaller scale. That is, the sleeve 29 is screw-threaded at its bottom and has a tooth 30 like that on the chuck. A ring 32 is adapted to screw u on the lower end of the sleeve 29 to hol therein another part.

In Fig. 9, I have shown inside the sleeve 29 a sleeve 33 having a flange 34 notched at 35, the outside of this sleeve being therefore similar to the outside of the sleeve 28 but on a smaller scale. The sleeve 33 has a tapered socket, like that of the sleeve 28, adapted to receive a taper-shank drill of small diameter.

In the form shown in Fig. 14, the sleeve 29 receives a drill 36 exactly similar to the drill 24;, but on a smaller scale. In Fig. 17 is shown a slotted member 37 similar to the in the sleeve 29, said slotted member 37 being adapted to receive a drill of flat crosssection in an obvious way and for an obvious purpose.

In the foregoing constructions, that is, of Figs. 9 to 17, inclusive, being those wherein means are provided for adapting a chuck to the use of relatively small drills, another most important advantage of in construction appears. In the use of or inary taper-shank drills, which are the standard and most common type in use, sleeves are provided whereby'a drill smaller than the chuck may be used, but owing to the tapered arrangement of one or more of these sleeves necessitates a considerable loweringof the" drill below the point which the drill of proper size for thechuck would have to occupy. With my construction on the contrary, one sleeve may be placed inside another to reduce the size of the chuck to any desired extent and each sleeve added will lower the end of the combined or built-up structure only the thickness of an additional ring, or slightly more. This, of course, results ina much firmer construction than was heretofore obtainable and one much more compact.

It will, of course, be understood that the present device can be used in many positions, either in drill presses, ratchets, or various sorts-of hand or machine-operated tools. It will also be evident that while the improvement is in a rather well-developed art it is capable of some variation without departing from the spirit of the invention disclosed; and therefore while the preferred forms have been set forth in detail, it is not intended to be limited thereto, except as pointed out. in the claims in which the intention is to claim all the novelty inherent in the construction as broadly as is permitted by the art.

I claim as new and desire to secure by Letters Patent:

1. In combination, a chuck of cylindrical form exteriorly-threaded at its end and provided with a tooth. a ring to screw up on said chuck and having an inturned lip, and a male part to enter the chuck and provided with a flange to lie between the end thereof and the lip of said ring, said flange being notched to be engaged by said toot-h, for the purpose set forth.

2. In combination, a chuc'k of cylindrical form exteriorly threaded at its end and provided with a tooth, a ring to screw up on said chuck and having an inturned lip, and a drill-head to enter said chuck provided with a. flange to lie between the end thereof and the lip of said ring, said flange being notched to be engaged by said tooth, for the purpose set forth.

3. In combination, a chuck of cylindrical upper end of the drill 36 and adapted to fit l form exteriorly threaded at its end and pro- 1,041,338 I i m vided with a tooth, a ring to screw up on said chuck and having an inturned lip and a sleeve to enter said chuck, said sleeve being exteriorly threaded at its end and being provided with a tooth, being also provided with a flange to lie between the end of said.

chuck and the lip of said ring, said flange being notched to receive said tooth, a second ring having an inturned lip to screw .up on the end of said sleeve and a drill fitting the sleeve and having a flange to lie between the sleeve and said second ring, and a notch to be engaged by the tooth of said sleeve.

4. In combination, a female part of cylindrical form exteriorly threaded at its end and provided with a tooth, a ring to screw up thereon having an inturned lip and a drill to enter said female part having a flange to lie between the end thereof and the lip of said ring, said flange being notched to be engaged by the tooth of said female part for the purpose set forth.

5. As an article of manufacture, a drill to cooperate with a chuck of the character described and having a cylindrical shank and a projecting notched flange, for the purpose set forth.

In testimony whereof I have hereunto set my hand.

CARL A. PALMGREN.

' In presence of two subscribing witnessesz' J. G. ANDERSON, R. A. SCHAEFER. 

